Side wall tube removal conspruction



April 26, 1932. J. 5. BENNETT SIDE WALL TUBE REMOVAL CONSTRUCTION Filed fiept. 18, 1929 5 Sheets-Sheet l r Jose 002% rnegzs,

I c p 5 April 26, 1932. J 5, BENNETT 1,855,542

SIDE WALL TUBE REMOVAL CONSTRUCTION Filed Sept, 18, 1929 5 Sheets-Sheet 2 P J. s. BENNETT SIDE WALL TUBE REMOVAL CONSTRUCTIQN Filed Sept. 18, 1929 5 Sheets-Sheet.

A ril 26, 1932. J, s BENNETT 1,855,542.

SIDE WALL TUBE REMOVAL CONSTRUCTION Filed Sept. 18, 1929 5 Sheets-Sheet 5 Patented Apr. 26, 1932 UNITED STATES PATENT OFFICE JOSEPH s. BENNETT, F PHILADELrIIIA, rENnsYLvANIA, ASSIGNOR. *ro nMnRIcAn ENGINEERING COM'PANY, OF PfiiLA'DELE Y PENNSYLVANIA SIDE WALL TUBE it;

Application filed. September 18, 1925. Serial No. 393,496.

the type shown in the application of Edward Wheeler for patent on side walls supporting structure, Serial No. 250,237, filed January 28, 1928.

An important object of the invention'is the provision of means defining an opening in the boiler wall in which a removable pier and packings maybe disposed which pier and packings when removed enable ready access to the cooling tubes of the side wall to permit their removal and replacement.

A still further object of the invention is to produce an apparatus of this character which may be readily incorporated in a furnace wall in the structure thereof, which may be readily and cheaply produced and which will be durable and efficient in service.

'A further object of the invention. is to produce an apparatus of this character which may be readily modified to adaptit to furnaces having side wall cooling structures in which the number of tubes employed is varied.

These and other objects I attain by the construction shown in the accompanying drawings wherein, for thepurpose of illustration, I have shown a preferred embodiment of my invention and wherein: v p

Fig. 1 is a front elevation of abo'iler wall embodying a tube removal construction in accordance with my invention;

Fig. 2 is a vertical sectional view through the wall adjacent the tube gate; I

Fig. is a verticalsectio'n through the water wall immediately adjacent the rear face of the front wall; I

Fig. 4: is a section on line 4-4 of 2; v

Fig. 5 is a. section on line 5-5 of Fig.2;

Fig. 6 is a perspective view of one ofthe sections of the sidewall of the gate;

Fig. 7 is; a perspective view of the gate cover;

Figs. 8 and 9 are perspective views of closing plates for use with the cover plate;

and

a oonronn'rron or a Fig. 10 is a perspective view of the gate 7 wall anchor employed. Referring now more particularly to the drawings, the numerals l0 and 11 indicate respectively thefront andside walls of a'" furnace. The side wall incorporates a cooling structure including tubes 12 extending from front to rear of the furnace atthe inner face of :this wall and preferably inclining rearwardly. The front and ear ends of these tubes are connected to headers 13 disposed exteriorly of the furnace. As a means for supporting the tubes and for supporting the boiler side wall, upper and lower channels 14 and 15 are employed, theseehannels being connectedat their inner flanges by perpendicularly related angle barslG against which the tubes abut and to which the tubes are secured.

The securin-gmean's for the tubes usually includes blocks of cast-iron or other refractory material, indicated at 17, which abut the inner surface. of the tube and" are grooved at their outer faces to receive the tube. Between theseblocksand the angle irons further refractory elements, indicated at 18, are employed so that the space about the tube is solidly filled. The upper and lower channels 1d and 15 haveeach, applied thereto a plate 19 which projects inwardly to the approximate center of the tube series and has secured thereto step castings 20 adapting theseplates to the brick work lying above and below the water-cooled section. I

As will be noted by comparison of Figs. 2

tubes comprising a rectangular outer defining wall the side sections of which are preferably built up of a plurality of: castings 22 so that the height ofthe gate may be varied to suit the requirements of furnaces in which the numbers of"water-c ooling. tubes employed are varied. The. outer faces of the 1 side walls have anchors 23 for projection into the brick work of the front wall and front and side wall connecting pier, and are preferably ribbed as at 24 to insure their rigidity and to further assist in maintaining them in applied positions.

The gate is preferably of less depth than the front wall, its projection entirely through this wall being unnecessary. and; one of the side walls of thegate ff 1" x Q mediately adjacent the proposed tubeli and slightly outwardly f illb vious from an inspection of Fig.4.

Upper and lower plates 25 connect the upper ends of the side walls and define the upper and lower ends of the gate. As hereinbefore stated, the refractory block 17 at the inner faces of thetubes, the insulation 18 at the outer faces of the tubes and the angle irons 16'project into the front wall and de fine a dam surroundingthe tubes at'the inner portion of this front wall. The remainder of the space'defined by the gate is filled with a removable pier 26 separately built from the front wall so that the brick work thereof may be very readily removed to provide a large opening through which the tubes may be readily manipulated. The width of this opening would be sufiicie'nt to permit passage of the tubes 12 between the inner side of the header 13 and the outer face of the inner wall of the gate.

After the pier 26 is in position packing indicated at 27 is placedabout the tubes between the inner face of the pier and theinner face of the outer wallof the gate and a cover plate 28'applied to the outer face of the gate 21 to cover the pier and to hold this packing in place. Gate cover 28 has its outer edge notched as indicated at 29 for the passage of the'tubes and closing plates 30 are employed to seal the outer ends of these notches and to cover those portions of the packing exposed thereby. The cover plate-28 andplates 30 are bolted in position so that they may be readily removed at any time to provide access to the removable pier and to the gate, thus to the tubes. 7 The ribs of the individual plates of the gate sides preferably include upper and lower marginal ribs 31 which are secured together, the securing elements of which, indicated at 82, may be conveniently employed for securing the anchors 23 in position. i i I It will be obvious that by use of a structure of this character access may be readily had 7 to the tubes for, 'removal'and replacement without the necessity of weakening the structure of the boiler wall in this process. It will also be obvious that the construction employed is capable of a considerable range ofchange and modification without departing from the spirit of my invention, and I accordingly do not limit myself to the specific gvall of the furnace defining an opening through which said tubes extend, said gate front and side walls, the side walls having a cooling section including longitudinally-extending tubes, headers disposed at the front of the furnace and with which said tubes communicate, the tubes projecting through I, the front wall of the furnace, of a gate-de- 7 fining structure incorporated in the front being of considerably greater width than the diameter of the tubes and a removable pier g0 filling the portions of the gate unoccupied by the tubes.

2. A boiler furnace including the usual front and side walls, the side walls having a cooling section including longitudinally- 35 extending tubes, headers disposed at the front of the furnace and with which said tubes communicate, the tubes projecting through the front wall of the furnace, of a gate-defining structure incorporated in the-e0 front wall of the furnace defining an opening through which said tubesextend, said gate being of considerably greater width than the diameter of the tubes, packing surrounding the tubes and a removable pier filling the '9 portions of the gate unoccupied by the packing and tubes.

3. A boiler furnace including the usual front and side walls, the side walls having a cooling section including longitudinally-ex-f ten-ding tubes, headers disposed at the front of the furnace and with which said tubes communicate, the tubes projecting through the front wall of the furnace, of a gate-defining structure incorporated in the front-105 wall of the furnace defining an opening through which said tubes extend, said gate being of considerably greater width than the diameter of the tubes, packing surrounding the tubes, .a removable pier filling the por-' 11C tions of the gate unoccupied by the'packing and tubes, and means at the inner and outer faces of the gate for retaining said packing.

4. A boiler furnace including the usual front and side walls, the side walls having a 1115 cooling section including longitudinally-extending tubes, a header disposed at the front of the furnace and in which said tubes communicate, the tubes projecting through the front wall of the furnace, and insulation 11 surrounding said tubes within the furnace and projecting into the front wall area, of means defining a gate in the front wall through which the tubes extend and into which the insulation carried by the tubes projects, a removable pier closing said gate at one side of the tubes and insulating packing surrounding the tubes between said pier and the opposite wall of the gate.

5. A boiler furnace including the usual front and side walls, the side walls having a cooling section including longitudinally-extending tubes, a header disposed at the front of the furnace and in which said tubes communicate, the tubes projecting through the front wall of the furnace, and insulation surrounding said tubes within the furnace and projecting into the front wall area, of means defining a gate in the front wall through which the tubes extend and into which the insulation carried by the tubes projects, a removable pierclosing said gate at one side of the tubes, and insulating packing surrounding the tubes between said pier and the opposite wall of the gate, said gate-forming means comprising a frame incorporated in the boiler wall in the structure thereof and a plate closing the outer end of said frame to cover said pier and retain said packing in position.

6. In a furnace, a series of tubes disposed substantially parallel to one wall of said furnace and extending through an opening in an adjoining wall, a wall-supporting frame defining said opening, a pier removably mounted in said opening, packing surrounding said tubes in the space between said pier and the walls of the opening, a

plate detachably secured to the frame at the outer end of said opening, said plate having recesses extending inwardly from one edge for reception of said tubes, and plate elements detachably secured to said frame and closing the portions of said recesses unoccupied by the tubes.

7. In a furnace having side and front walls, said front wall having an opening adjacent the juncture of said walls, a series of tubes mounted in said side wall and projecting at one end through said front wall opening, a plurality of facing elements secured in engagement with said tubes and forming a portion of the effective innerwall surface of said side wall, said facing elements extending in a continuous series terminating at one end Within said front wall opening, and removable means for effec tively closing said front wall opening to form a substantially continuous inner front wall surface adjoining the inner surface of said side wall, said tubes being removable from the furnace structure through said front wall'opening in substantially the same plane in which they lie when installed.

JOSEPH S. BENNETT. 

